<template>
	<!-- 登录页面的整体盒子 -->
	<div class="login-container">
		<!-- 登录的盒子 -->
		<div class="login-box">
			<!-- 标题的盒子 -->
			<div class="title-box"></div>
			<!-- 登录的表单区域 -->
			      <h1>登录界面</h1>
			<el-form :model="loginForm" :rules="loginRules" ref="loginRef">
				<!-- 用户名 -->
				<el-form-item prop="username">
					<el-input v-model="loginForm.username" placeholder="请输入用户名" maxlength="10" minlength="1"></el-input>
				</el-form-item>
				<!-- 密码 -->
				<el-form-item prop="password">
					<el-input v-model="loginForm.password" type="password" placeholder="请输入密码" maxlength="15"
						minlength="6"></el-input>
				</el-form-item>
				<el-form-item>
					<el-button type="primary" class="btn-login" @click="loginFn">登录</el-button>
					<el-link type="info" @click="$router.push('/reg')">去注册</el-link>
				</el-form-item>
			</el-form>
		</div>
	</div>
</template>

<script>
	import {
		loginAPI
	} from '@/api'
	import {
		mapMutations
	} from 'vuex'
	export default {
		name: 'my-login',
		data() {
			return {
				// 登录表单的数据对象
				loginForm: {
					username: '',
					password: ''
				},
				// 登录表单的验证规则对象
				loginRules: {
					username: [{
							required: true,
							message: '请输入用户名',
							trigger: 'blur'
						},
						{
							pattern: /^[a-zA-Z0-9]{1,10}$/,
							message: '用户名必须是1-10的字母数字',
							trigger: 'blur'
						}
					],
					password: [{
							required: true,
							message: '请输入密码',
							trigger: 'blur'
						},
						{
							pattern: /^\S{6,15}$/,
							message: '密码必须是6-15的非空字符',
							trigger: 'blur'
						}
					]
				}
			}
		},
		methods: {
			...mapMutations(['updateToken']),//映射组件方法
			// 登录按钮->点击事件
			async loginFn() {
				this.$refs.loginRef.validate(async valid => {
					if (valid){
						// 1. 发起登录的请求
						const {
							data: res
						} = await loginAPI(this.loginForm)//就是为了拿到后台真正的数据赋予res
						//根据后台返回的登录提示信息，做判断给用户提示
						//直接用后台返回的提示message值
						// 2. 登录失败
						if (res.code !== 0){
							 this.$message.error(res.message)
							 //提交给mutatio把token字符串保存到vuex中
						}
						//登录成功
						else{
							this.$message.success(res.message)
							this.updateToken(res.token)
							this.$router.push('/')
						}
					}
				})
			}
		}
	}
</script>

<style lang="less" scoped>
	.login-container {
		background: url('../../assets/images/tu.jpg') center;
		background-size: cover;
		height: 800px;

		.login-box {
			width: 400px;
			height: 300px;
			background-color: #fff;
			border-radius: 3px;
			position: absolute;
			left: 50%;
			top: 50%;
			transform: translate(-50%, -50%);
			padding: 0 30px;
			box-sizing: border-box;
            background: url(../../assets/images/tu1.jpg) no-repeat center;
			background-size: cover;
			.title-box {
			    text-decoration: antiquewhite;
			}

			.btn-login {
				width: 100%;
			}
		}
	}
</style>